Healthy Volunteers
healthy people welcome
at UC Davis
study started
completion around
Principal Investigator
by Heather Siefkes, MD, MSCI (ucdavis)



The purpose of this study is to implement and externally validate an inpatient ML algorithm that combines pulse oximetry features for critical congenital heart disease (CCHD) screening.


The study will externally validate an algorithm that combines non-invasive oxygenation and perfusion measurements as a screening tool for CCHD. In a previous study, the investigators created an algorithm that combines non-invasive measurements of oxygenation and perfusion over at least two measurements using machine learning (ML) techniques. The prior model was created and tested using internal validation (k-fold validation). Thus, the investigators will test the model on an external sample of patients to test generalizability of the model. Additionally, the team will trial a repeated measurement for any "failure" of the screen to assess impact on the false positive rate. Study team will also use repeated pulse oximetry measurements (up to 4 total and including measurements after 48 hours of age, which may be done outpatient) to create a new algorithm that incorporates new data over time. The central hypothesis is that the addition of non-invasive perfusion measurements will be superior to SpO2-alone screening for CCHD detection and a model that incorporates repeated measurements will enhance detection of CCHD while preserving the specificity.


Congenital Heart Disease, Machine Learning Algorithm, Pulse Oximetry, Heart Diseases, Congenital Heart Defects


You can join if…

  • Age < 22 days
  • Fetuses suspected to have congenital heart disease
  • Newborns with suspected/confirmed critical congenital heart disease
  • Asymptomatic newborn undergoing SpO2 screening for CCHD

You CAN'T join if...

  • Echocardiogram completed prior to enrollment as the newborn would then no longer be considered "asymptomatic undergoing SpO2 screening for CCHD"
  • For Newborns with confirmed/suspected congenital heart disease (CHD): a) Patent ductus arteriosus and/or atrial septal defect/patent foramen ovale without other defects, b) Corrective cardiac surgical or catheter intervention performed before enrollment or c) Current infusions of vasoactive medications other than prostaglandin therapy.


  • UC Davis Medical Center accepting new patients
    Davis California 95616 United States
  • University of Utah Health Care not yet accepting patients
    Salt Lake City Utah 84102 United States
  • Cohen Children's Medical Center not yet accepting patients
    Queens New York 11040 United States

Lead Scientist at University of California Health

  • Heather Siefkes, MD, MSCI (ucdavis)
    Assistant Professor, Pediatrics, School of Medicine. Authored (or co-authored) 19 research publications


accepting new patients
Start Date
Completion Date
University of California, Davis
Study Type
Expecting 240 study participants
Last Updated